You have to be prepared to see piracy of your content. In the online world we live in today it is certain that there will be people who don't pay for your product. The important thing is that you understand that and are prepared to focus on your sales.

It's something you just have to accept will happen. Even companies with deep pockets can't prevent piracy from happening. However, you can attempt to limit your damage by keeping an eye out for illegal shares of your product and filing takedown notices with the hosts.